INTRODUCTION HERTIAGE amplifiers provide high-performance sound reinforcement for your mobile audio equipment. Its versatility enables compatibility with optional Equalizers, Frequency Dividing Crossover Networks, and other audio processors in a customized system. The Multi-Mode bridging capabilities allow flexibility in hosting several different speaker configurations. To achieve optimum performance, it is highly recommended that you read this Owners Manual before beginning installation. WARNING High powered audio systems in a vehicle are capable of generating "Live Concert" high levels of sound pressure. Continued exposure to excessively high volume sound levels may cause hearing loss or damage. Also, operation of a motor vehicle while listening to audio equipment at high volume levels may impair your ability to hear external sounds such as; horns, warning signals, or emergency vehicles, thus contributing to a potential traffic hazard. In the interest of safety, HERTIAGE recommends listening at lower volume levels while driving.
PLANNING YOUR SYSTEM Before beginning the installation, consider the following: 1. Do you plan to add additional mobile electronics equipment in the future? If you plan to expand your system by adding other components sometime in the future, ensure adequate space is left and cooling requirements are met. 2. Should you use high or low level inputs? Your Amplifier has been designed to accept Low-Level(Pre-Amp outputs from your radio) source signal. If your radio/source is equipped with Pre-Amp outputs, it is possible to utilize them to drive the Amplifier and the 2 front speakers. Then, use the built-in power of your radio to drive the 2 rear speakers. 3. Are your components matched? The RMS power rating of your speaker(s) must be equal or greater than the RMS power rating of your amplifier. Your speaker(s) also must be 2-8 Ohms impedance for stable amplifier operation. Impedance information is normally printed on the speaker basket or magnet. 4. Where will the amplifier be installed? Consider both the length of your leads, and routing when determining the mounting location. It is best to run power and RCA wiring on opposite sides of the vehicle to prevent induced noise. Pre-amp input jacks require a length of high quality shielded male to male RCA patch cord.
CONNECTING THE POWER CAUTION: AS A PRECAUTION, DISCONNECT THE POWER WIRE FROM THE BATTERY WHILE MAKING THE POWER AND GROUND CONNECTIONS TO THE AMPLIFIER. 4/8 GAUGE(Thicker if planning for additional Amplifiers) wire is recommended for both the power and ground wires 12 Gauge, for the remote turn-on wire 16 Gauge. Both types are available at most Mobile Audio Dealers or Installation Shop. (1) Ground : To Vehicle Chassis To avoid unwanted ignition noise caused by ground loop, it is essential that the Amplifier be grounded to a clean, bare, metal surface of the vehicle's Chassis NOTE : GROUND WIRE SHOULD NOT BE EXTENDED MORE THAN 3 FT. (1 METER). (2) +12 Volt(Fused) Constant Power: To Battery (+) Due to the power requirements of the Amplifier, this connection should be made directly to the positive (+) terminal of battery. For safety measures, install an in-line Fuse Holder (not included) as close to the battery positive (+) terminal as possible with an ampere rating; not to exceed total value of fuses in Amp. (3) Remote Turn-On Input: To remote turn-on output of Car Stereo This Amplifier is turned "ON" remotely when the vehicle's stereo is turned "ON". NOTE : IF YOUR RADIO DOES NOT HAVE A +12 VOLT OUTPUT LEAD WHEN THE RADIO IS TURNED ON, THE "REMOTE" TERMINAL ON THE AMPLIFIER CAN BE CONNECTED TO VEHICLE'S ACCESSORY CIRCUIT THAT IS LIVE WHEN THE KEY IS "ON".
PANEL LAYOUT HTG157 FRONT VIEW 1 9 2 6 4 3 8 HTG237 / HTG257 FRONT VIEW 1 9 2 4 4 6 8 HTG2100D FRONT VIEW 1 9 2 3 5 5 6 7 8 HTG447 FRONT VIEW 6 4 4 2 1 1 2 4 4 6 8
PANEL LAYOUT HTG157 REAR VIEW 10 11 12 13 14 HTG237 / HTG257 REAR VIEW 10 11 12 13 14 HTG2100D REAR VIEW 10 11 12 13 14 HTG447 REAR VIEW 10 11 12 13 14
CONTROL FUNCTIONS 1. RCA input jacks These RCA input jacks are for use with source units that have RCA or Line level outputs. A source unit with a minimum level of 200mV is required for proper operation. The use of high quality twisted pair cables is recommended to decrease the possibility of radiated noise entering the system. 2. GAIN Control The level control will match the amplifiers sensitivity to the source units signal voltage. The Operating range is 200mV minimum to 6V maximum. CAUTION: Do not run the amplifier in high volume for long time, otherwise the loudspeakers will be damaged. 3. SUBSONIC HTG157:The frequency can be adjusted between 0Hz and 80Hz. HTG2100D:The frequency can be adjusted between 10Hz and 60Hz. 4. X-OVER * Full pass x-over switch When the switch is in the Full position, the full range is bypassed. * Low pass x-over switch When the switch is in the LPF position, frequencies lower than the low pass frequency setting are passed. HTG157/HTG237/HTG257/HTG447 : The frequency can be adjusted between 50Hz and 250Hz. * High pass x-over switch When the switch is in the HPF position, frequencies higher than the high pass frequency setting are passed. HTG237/HTG257/HTG447 : The frequency is 80Hz. 5. Low pass x-over frequency control This control is used to select the desired low pass x-over frequency. The frequency can be adjusted between 50Hz and 250Hz. 6. Bass BOOST HTG237/HTG257/HTG2100D : The boost can be adjusted between 0dB to12db. HTG157/HTG447 : The boost can be selected among 0dB, 6dB and 12dB. 7. REMOTE Controls the subwoofer amplifier gain, from a remote location for ease of adjustment during listening. Warning: Do not connect a level control knob from other manufacturers to the Remote Sub Level Control of any amplifier. Even though the connectors fit properly, the control knob and connector pin positions may be different and the amplifier will be damaged.
CONTROL FUNCTIONS 8. LED Will illuminate GREEN to indicate the amplifier is on and operating normally, and will be illuminated RED if the amplifier shuts down due to short circuit, DC offset, or overheating detected by on board protection circuitry 9. Auxiliary outputs The Auxiliary outputs offer HERTIAGE amplifiers easy, unlimited system expansion. Route RCA s from the line out of the first amplifier to the line input of a second amplifier when using a single source output. 10. GND Connect this terminal directly to the sheet metal chassis of the vehicle, using the shortest wire necessary to make this connection. Always use wire of the same gauge or larger than the (+)12 volt power wire. The chassis connection point should be scraped free of paint and dirt. Use only quality crimped and/or soldered connectors at both ends of this wire. Warning : Do not connect this terminal directly to the vehicle battery ground terminal or any other factory ground points. 11. Remote Turn On This terminal turns on the amplifier when (+)12 volt is applied to it. Connect it to the remote turn on lead of the head unit or signal source. 12. (+)12 Volt Power Connect this terminal through a FUSE or CIRCUIT BREAKER to the positive terminal of the vehicle battery or the positive terminal of an isolated audio system battery. Warning: Always protect this power wire by installing a fuse or circuit breaker of the appropriate size within 12 inches of the battery terminal connection. 13. FUSE These fuses protect the amplifier against internal electrical damage and are meant to protect the amplifier only. All other power connections should be fused at the source. 14. SPEAKERS Connect subwoofers to these terminals.
System Diagrams MONO Channel System Design #1 HTG157 2-4 HTG2100D 2-4
System Diagrams 2Channel System Design #1 HTG237 / HTG257
System Diagrams 2Channel System Design #2 HTG237 / HTG257
System Diagrams 2Channel System Design #3 HTG237 / HTG257
System Diagrams 4Channel System Design #1 HTG447
System Diagrams 4Channel System Design #2 HTG447
System Diagrams 4Channel System Design #3 HTG447 WOOFER 4-8ohms 1CH 4-8 Ohms 2CH 4-8 Ohms 3CH 4-8 Ohms 4CH 4-8 Ohms WOOFER 4-8ohms
TROUBLE SHOOTING GUIDE SYMPTOMS CHECK POINTS CURE NO SOUND AMP NOT SWITCHING ON NO SOUND IN ONE CHANNEL AMP TURNING OFF MEDIUM/ HIGH VOLUME Is the power LED illuminated? No power to power wire No power to remote wire with receiver on Fuse broken Check speaker leads Check audio input leads Check speaker load impedance Check fuses in amplifier. Be sure Turn-on lead is connected Repair power wire or connections Check connections to radio Check fuse Inspect for short circuit or an open connection. Reverse Left and Right RCA inputs to determine if it is occurring before the amp. Check Tuner/Deck volume level. Clean contacts on fuse holders. Be sure proper speakers are used to ensure impedance recommendations are observed. (If you use an Ohmmeter to check speaker resistance, please remember that DC resistance and AC impedance may not be the same.)
System Diagrams 4Channel System Design #1 HTG447
System Diagrams 4Channel System Design #2 HTG447
System Diagrams 4Channel System Design #3 HTG447 WOOFER 4-8ohms 1CH 4-8 Ohms 2CH 4-8 Ohms 3CH 4-8 Ohms 4CH 4-8 Ohms WOOFER 4-8ohms
TROUBLE SHOOTING GUIDE SYMPTOMS CHECK POINTS CURE NO SOUND AMP NOT SWITCHING ON NO SOUND IN ONE CHANNEL AMP TURNING OFF MEDIUM/ HIGH VOLUME Is the power LED illuminated? No power to power wire No power to remote wire with receiver on Fuse broken Check speaker leads Check audio input leads Check speaker load impedance Check fuses in amplifier. Be sure Turn-on lead is connected Repair power wire or connections Check connections to radio Check fuse Inspect for short circuit or an open connection. Reverse Left and Right RCA inputs to determine if it is occurring before the amp. Check Tuner/Deck volume level. Clean contacts on fuse holders. Be sure proper speakers are used to ensure impedance recommendations are observed. (If you use an Ohmmeter to check speaker resistance, please remember that DC resistance and AC impedance may not be the same.)
SPECIFICATIONS HTG157 HTG237 HTG257 HTG447 HTG2100D MAXIMUM POWER OUTPUT 2000W 1000 000W 2000W 2400W POWER OUTPUT RMS @4Oh 1CH X 1000W CH X 125 CH X 500W 4CH X 250W 1CH X 350W POWER OUTPUT RMS @2Oh 1CH X 1500W CH X 225 CH X 650W 4CH X 350W 1CH X 800W POWER OUTPUT RMS @1Oh ON ON ON CH X 1200W BRIDGED POWER MAX @4Oh ON CH X 1000 CH X 2000W ONE TH D 0.01 0.01 0.01 0.01 0.01 FREQUENCY RESPONSE -3.0dB 45KH 45KH 5KHz 50Hz HP F 80Hz 8 0Hz 80Hz 80Hz NONE LP F 50-250H 5 0-250H 0-250H 50-250Hz(12dB, 24dB) BASS BOOST(50Hz ) 0, 6, 12dB (selectable) 0-12d -12dB 0, 6, 12dB (selectable) 0-12dB ADJUSTABLE SENSITIVITY RANG.2-6.2-6.2-6.2-6.2-6V INPUT IMPEDANCE(LOW LEVEL) 20K 20K 20 K 2 0K 20K FUSE 0A X 25A X 0A X 0A x 3 DIMENSION(D x W x H inch 12.99 X 8.81 X 2.24.84 X 8.81 X 2.24 12.99 X 8.81 X 2.24 14.96 X 8.81 X 2.24 14.96 X 8.81 X 2.24